and then finally senator mccain stressed why wasn't there some u.s. military power available to come to the rescue of the people who were trapped in the embassy annex so that people wouldn't have ended up dying on the roof essentially unable to protect themselves against the mortar fire they were taking. and you could see, he's still angry about it. >> rose: the other thing he considered unacceptable was her response with senator johnson when she said, "what difference does it make?" >> i thought that was an especially poignant response from secretary clinton. and it reflected an uncertainty to this day i'm told among intelligence officers who have reviewed the evidence they have of what happened that night believing it or not they still don't know precisely how that attack came to happen. they know there were terrorists who were associated with al qaeda, were part of the group. they know there were others who kind of wandered into the scene. and when secretary clinton said "what difference does it make exactly how it came together, let's find it and